<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>搜索框</title>
		<style type="text/css">
			* {
				padding: 0;
				margin: 0;
			}

			.search {
				width: 200px;
				margin: 100px auto;
				display: flex;
				/*border: 1px solid red;*/
			}

			.search input {
				float: left; /* //左浮动 */
				flex: 4;
				height: 30px;
				outline: none;
				border: 1px solid red;
				box-sizing: border-box; /* 盒子模型，怪异IE盒子模型 width=content+border*2+padding*2 */
				padding-left: 10px;
			}

			.search button {
				float: right;
				flex: 1;
				height: 30px;
				background-color: red;
				color: white;
				border-style: none;
				outline: none;
			}

			.search button i {
				font-style: normal;
			}

			.search button:hover {
				font-size: 16px;
			}
		</style>
	</head>
	<body>
		<div class="search">
			<input type="text" placeholder="请输入..." name="" id="" value="" />
			<button><i>搜索</i></button>
		</div>
	</body>
</html>
